Clean up migrations for projects geo gis

[partizipation]

See https://github.com/liqd/adhocracy4/blob/main/adhocracy4/projects/migrations/0052_project_remove_geos_point_field.py

[m4ra]

@partizipation won\t fix bcz mB has already other migration dependency on the last 0052 and cannot unapply it in production environment. It is ugly. but it doesn't create issues either. So I suggest we close this issue.